yes
yes
When I called the customer services, this lady said
When i went to pakistan i used a different sim card called Lebara mobile
Yes, you should be able to use a T Mobile SIM card on any T Mobile phone.
Yes you can
no
If the prepaid SIM is also from T-Mobile, then yes.
Well . There are two major mobile carriers. One is called China Mobile, and cell phones with their service usually use sim cards. And the other one is called China Unicom, and they are using CDMA which does not use sim cards.
Virgin Mobile uses CDMA, so their phones do not take SIM cards.
Provided that the Android phone is a GSM-capable phone, and has some of the same bands that T-Mobile uses, then it is possible to use a T-Mobile sim card on it.
97% !
There are many mobile phones that do not require a SIM card, it depends on the service provider. Any phones from Sprint and Verizon do not use SIM cards.